期刊
INTEGRATED FERROELECTRICS
卷 101, 期 -, 页码 50-62出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/10584580802451611
关键词
Ferroelectric and ferroelastic domains; BaTiO(3); Ginzburg-Landau theory
Properties of ferroelectric domain walls corresponding to rotations of the spontaneous electric polarization by 90 or 180 degrees are investigated in the framework of material-specific generalized Ginzburg-Landau-Devonshire model involving long-range dipole-dipole interactions. Thickness and surface energy for these domainwalls in the tetragonal and the orthorhombic phases of BaTiO(3) are evaluated in the charge-free approximation using model parameters determined from independent experiments. Both types of domain walls occur spontaneously in domain pattern simulations, although in the orthorhombic phase the 180-degree domain walls are very rare. The simulated domain patterns and domain wall properties are discussed and the relation to the pronounced anisotropy of the gradient term is pointed out.
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